大跨斜拉输煤栈桥设计中的关键技术

Key technologies for designing large span cable-stayed coal handling trestle

以净跨66.648m的大跨度输煤栈桥为背景工程,利用大型结构分析软件SAP2000,对该桥的动力特性、支架柱刚度等性能进行分析研究,在此基础上分析输煤栈桥的振动、颤振稳定性.分析表明:盆式橡胶支座能有效降低输煤栈桥振动效应;预应力拉索能有效降低结构跨中挠度;钢管混凝土能有效提高栈桥支架柱刚度,该输煤栈桥具有良好的动力特性.

A large-span coal handling trestle with clear span of 66.648mhas been studied.The dynamic characteristics and stiffness of column have been analysed by SAP2000.Then,the vibration and flutter stability of coal handling trestle have been analyzed on this basis.The analytical results show that pot-type rubber pad can effectively reduce vibration effect of the coal handling trestle;prestressed cable can reduce the mid-span deflection of the structure,concrete-filled steel tube can increase the stiffness of column.The coal handling trestle has good dynamic characteristics.